Locomotive rod bearing



March 1936- 'r. v. BUCKWALTER I LOCOMOTIVE ROD BEARING Filed June 1, 1931 2 Sheets-Sheet I VENTOP' March 3, 1936. v BUCKWALTER 2,032,466

LOCOMOTIVE ROD BEARING Filed June 1, 1931 2Sheets-Sheet 2 195" PAD/U6 OUTEF Patented Mar. 3, 1936 I 2,032,466

UNITED STATES PATENTOFFICE LOCOMOTIVE ROD BEARING Tracy V. Buckwalter, Canton, Ohio, assignor to The Timken Roller Bearing Company, Canton, Ohio, a corporation of Ohio Application June 1, 1931, Serial No. 541,384

3 Claims. (01. 30872) My invention relates to the bearings of 1000- at the other ends of said side rods 4 is 180 inches; motive drive rods and has for its principal object and the radius of curvature of. said inner bearing a construction that will withstand the very severe member 8 of said main rod bearing is 180.6 inchesusage to which such bearings are subject. The The radius of curvature of the outer bearing meminvention consists principally in providing the ber 9 may be the same as that of the inner mem- 5 bearing surfaces of such bearings with an endwise her; or it may be somewhat greater. The drawcurvature whose center is located approximately ings illustrate the radius of curvature of the outer at the other end of the rod from said bearing. bearing member as being approximately 195 The invention further consists in the locomotive inches. These dimensions, of course, Would be 10 rod bearing and in the parts and combinations different in trucks having different side rod 10 and arrangements of parts hereinafter described lengths.

and claimed. The side rod bearing on the main crank pin 5 In the accompanying drawings, comprises an innner bearing member l4 mounted Fig. 1 is a diagrammatic plan view of three of against the wheel and an outer bearing member the four axles of. a locomotive truck, the main I5, said inner bearing member having an outer 15 drive rod and side rods at one side only of the end flange l6 overlapping the end of said outer truck being illustrated, bearing member Hi. The inner and outer bear- Fig. 2 is a sectional view on the line 2-2 of mg members l4 and I5 are curved endwise as preg- 1, viously described in connection with the main rod Fig. 3 is a sectional view on the line 3-3 of bearing. The ends of the outer bearing member 20 l5 are spaced away from the wheel 2 and from 4 is a Side elevation of t n Crank pin the end flange [6 of the inner bearing member l4; and associated parts, and and the outer bearing member 9 of. the main rod Fig. 5 is a sectional View on the line 55 oi bearing is spaced away from the inner bearing Fi 1. member l4 of the side rod bearing as well as from 25 The drawings illustrate three axles l of a four the end flange ll of the main rod inner bearing axle truck, with the wheels 2, main drive rod 3 member 8. and side rods 4. The main drive rod is rotata- The bearings at the other ends of the side rods bly mounted on the main crank pin 5 and the side comprise convexly curved inner bearing members drive rods 4 are pivotally connected to a bearing ll mounted against the Wheels 2 and concavely 30 member 6 that is rotatably mounted on said curved outer bearing members l8, the ends of said main crank pin 5. The other ends of said side outer bearing members being spaced slightly away rods 4 are rotatably mounted on crank pins 1 of from the wheels. Each end of said outer bearing adjacent wheels. member has a flange l9 bearing against a side The bearing of the main rod comprises an rod 4. Said member l8 may be in the form of 35 inner bearing member 8 of brass or other suitable separate rings We each with one end flange l9, material whose bearing surface is convexly curved said rings being easily inserted in the sides of the endwise and an outer bearing sleeve 9 of. steel or rods. The bearing members ll or l8 will be other suitable material whose bearing surface is curved endwise as hereinbefore described incon- 4 concavely curved endwise. Said inner bearing nection with the other bearings. 40 member may be made of separate parts So as By reason of the endwise curvature of the bearshown for convenience in assembly. The inner ing members, relative movement of the parts is bearing member 8 is mounted on a reduced end accommodated without causing heating and scorportion ill of the main crank pin and it has a peing of the bearing members. The use of the large 5 ripheral flange II at its outer end that overlaps radius of curvature and the location of the center the outer bearing member. The inner bearing of curvature of each bearing a considerable dismember 8 is provided with suitable lubricant tance from the axis of the bearing, preferably at grooves I2 and is supplied with lubricant by means the center of the bearing at the opposite end of of a lubricant cup l3 on said main rod that the rods is an important feature of the construcfeeds through an opening in the outer bearing tion; since rocking movement of the truck parts 50 member 9. The radius of curvature of the inner is not accommodated either by cylindrical bearbearing member is substantially the same as the ing members or by members having an endwise distance from center to center of the side rods curvature of short radius.

4. As illustrated, the distance from the side rod What I claim is:

bearing on the main crank pin 5 to the bearings 1. A plain bearing construction for the main 55 rod. and side rods of locomotive trucks in which the bearing surfaces of the inner and outer bearing members are provided with an endwise curvature whose radius is substantially the center to center length of said side rods, the radius of curvature of the outer bearing member being somewhat larger than that of the inner bearing member.

2. A locomotive rod plain bearing construction comprising an inner bearing member composed of a plurality of arcuate sections, and an outer bearing member, the bearing surfaces of said inner and outer members having an endwise curvature Whose radius is substantially the length of said rod, the radius of curvature of said outer bearing member being somewhat greater than that of said inner bearing member.

3. A plain bearing construction for the main rod and side rods of locomotive trucks in which the bearing surfaces of the inner and outer hearing members are provided with an endwise curvature whose radius is substantially the center to center length of said side rods, the radius of curvature of the outer bearing member being somewhat larger than that of the inner bearing 10 member, said inner bearing member having an end flange overlapping said outer bearing member but spaced therefrom.

TRACY V. BUCKWALTER. 

